Q4 Test

The lowest level of environmental complexity that includes living and nonliving factors is the

• biome

• community

• ecosystem

• biosphere

Which ecological inquiry method is an ecologist using when he or she enters an area periodically to count the population numbers of a certain species?

• questioning

• observing

• experimenting

• modeling

A mathematical formula designed to predict population fluctuations in a community could be called a(n)

• biological experiment

• biological system

• ecological model

• ecological observation

How do most primary producers make their own food?

• by using light energy to make carbohydrates

• by using chemical energy to make carbohydrates

• by changing water into carbon dioxide

• by breaking down remains to make carbon dioxide

Compared to land, the open oceans

• have less zooplankton.

• contain unlimited nitrogen.

• are nutrient-poor environments.

• are rich in silica and iron.

All the interconnected feeding relationships in an ecosystem make up a food

• interaction

• chain

• network

• web

The total amount of living tissue within a given trophic level is called the

• organic mass

• trophic mass

• energy mass

• biomass

What animals eat both producers and consumers?

• herbivores

• omnivores

• chemotrophs

• autotrophs

A bird stalks, kills, and then eats an insect. Based on its behavior, which pair of ecological terms describes the bird?

• herbivore, decomposer

• producer, heterotroph

• carnivore, consumer

• autotroph, herbivore

What goes in Box 5 of the food web in the figure?

• herbivores

• scavengers

• carnivores

• decomposers